Dutch steel dredger Kaliwaal 21 built at Hardinxveld, Netherlands according to the Dutch magazine Schip en Werf dated 23 October 1931

An item reported that the Dutch steel dredger Kaliwaal 21 with as dimensions 35 x 7 x 2,70 metres was launched by the Scheepsbouwwerf en Machinefabriek Holland, Hardinxveld, Netherlands.